Friday, November 8

Top 9 Things You Should NEVER Do Before a Blood Test

blood test
Photo by Kabachki. photo from Shutterstock

4. Caffeinated beverages or coffee in general

It could be suggested that you give up coffee if you have an early-morning blood test. This is mostly due to caffeine’s significant impact on the heart and blood pressure.

You will seem dehydrated even when you are not, since caffeine is a diuretic and eliminates water from the body. 500 ml of water should be used to replace the coffee cup. Drinking a lot of water 15 minutes before a urine test is highly advised.

5. Supplements or any specific medication

It is recommended to have lab tests performed either before or 10–14 days after taking any medications you are thinking about taking. The diagnosis of infections, cancer, anemia, and heart disease can be impacted by dietary supplements and vitamins. For proper detection, the doctor could refer you to a different or modified testing procedure.
Be sure to let the doctor know before the blood tests if you are taking any medications that must be stopped.

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9 thoughts on “Top 9 Things You Should NEVER Do Before a Blood Test”

  1. I’ve only heard of some of the suggestions when fasting was necessary. I was told for most tests you want things as normal as possible so they can see what your levels are under normal circumstances.

    1. My doctor told me to fast before raking sugar test and it was when they were doing my annual test for everything i was told to not eat/drink anything except water after 10pm the night before my blood work at 8am

      1. Same from my doctor. The suggestion here “It is recommended to have lab tests performed either before or 10–14 days after taking any medications you are thinking about taking” is wrong.

      2. Jan C. Turczynski

        I had a doctor send me for a blood test and never asked what I ate or drank and when I did. Needless to say it was a one time visit with that incompetent sob. He also told me to stop taking supplements that it was a waste of money. The guy was an idiot.

  2. Mr. David Rowinski

    Re: page 4 “… postpone it for two or three days after the tests.” Should this be “before” the tests?

    1. Yes. I believe they meant prior to testing.
      Seems to be a typo. Probably due to starvation before going to a blood test next day.

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